<div class="nav_header">
    <header id="header" class="mui-bar mui-bar-nav">
        <a class="back mui-action-back mui-icon mui-icon-left-nav mui-pull-left"></a>
        <h1 class="mui-title">@@pagename</h1>
        <a class="download mui-pull-right fa fa-download"><em>APP下载</em></a>
    </header>
</div>